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Exploring Indium-Based Ternary Thiospinel as Conceivable High-Potential Air-Cathode for Rechargeable Zn-Air Batteries

机译：探索铟基三硫代松油作为可充电锌空气电池的高潜力空气阴极

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摘要

Reversible oxygen reactions in Zn-air batteries require cost-effective and highly-active bifunctional electrocatalysts to substitute traditional noblemetal based catalysts. Herein, a new and promising electrocatalytic material, ternary CoIn2S4 thiospinel, is demonstrated for effectively catalyzing oxygen reduction and oxygen evolution reactions (ORR and OER) with S-doped reduced graphene oxide (S-rGO) as an electronic conductor. Compared with Co9S8/S-rGO (without In doping), the newly developed CoIn2S4/S-rGO reveals superior electrocatalytic properties for the ORR (half-wave potential of 0.83 V) and OER (overpotential of 0.37 V at 10 mA cm(-2)), demonstrating that the introduction of In can promote the reversible oxygen electrode reactions of CoIn2S4. The superior experimentally- observed electrocatalytic properties are corroborated via density function theory investigations. Meanwhile, the synergistic improvements in the bifunctional activities resulting from the combination of CoIn2S4 and S-rGO are also confirmed. As a proof of concept, home-made Zn-air cells are assembled with CoIn2S4/S-rGO as an air-cathode. The developed Zn-air cells exhibit a high peak power density (133 mW cm(-2)) with an energy density of 951 Wh kgZn(-1) and robust cycling stability over 150 cycles for 50 h, exceeding of those commercial Pt/C+ RuO2 which highlights the practical viability of CoIn2S4/S-rGO for rechargeable Zn-air batteries.
机译：锌空气电池中的可逆氧气反应需要经济高效且高活性的双功能电催化剂来替代传统的贵金属基催化剂。在本文中，新型的和有希望的电催化材料，三元CoIn2S4硫代松油，被证明可以有效地催化氧还原和氧放出反应（ORR和OER），并以S掺杂的还原氧化石墨烯（S-rGO）作为电子导体。与Co9S8 / S-rGO（无In掺杂）相比，新开发的CoIn2S4 / S-rGO对ORR（半波电势为0.83 V）和OER（在10 mA cm（-时的超电势为0.37 V）显示出优异的电催化性能。 2）），证明引入In可以促进CoIn2S4的可逆氧电极反应。通过密度函数理论研究证实了优异的实验观察到的电催化性能。同时，还证实了由CoIn2S4和S-rGO的组合导致的双功能活性的协同改善。作为概念验证，将自制的Zn-空气电池与CoIn2S4 / S-rGO组装在一起作为空气阴极。发达的锌空气电池表现出高峰值功率密度（133 mW cm（-2）），能量密度为951 Wh kgZn（-1），在150个循环中持续50 h的鲁棒循环稳定性，超过了商业Pt / C + RuO2强调了CoIn2S4 / S-rGO在可充电锌空气电池中的实用性。

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  • 来源
    《Advanced energy materials》 |2018年第31期|1802263.1-1802263.12|共12页
  • 作者

    Fu Gengtao; Wang Jie; Chen Yifan; Liu Yu; Tang Yawen; Goodenough John B.; Lee Jong-Min;

  • 作者单位

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

    Qingdao Agr Univ, Sch Chem & Pharmaceut Sci, Qingdao 266109, Peoples R China;

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

    Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China;

    Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA;

    Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore;

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  • 正文语种 eng
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  • 关键词

    bifunctional electrocatalyst; CoIn2S4; graphene; synergetic effects; Zn-air batteries;

    机译：双功能电催化剂CoIn2S4石墨烯协同效应锌空气电池;

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